Great way to yell at your friends.

A well done co-op FPS/1st person platformer with some grindy RPG thrown in. Different mission types / environments with newly generated maps keep it from becoming too repetitive as long as you like the general game play.

It's not without its bugs. I've fallen off the map and had some map syncing issues where a tunnel existed for everyone else but me.

One major game breaking bug that makes it unplayable. If you need to turn using controllers, it will often teleport you elsewhere. I've hit an area where if I turn at all anywhere, I am teleported off the map and have to restart the area.